<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>计算器</title>
</head>

<body>
    <div class="calculator J_calculator">
        <!-- <div class="input-group">
            <input type="text" class="num-input" class="num-input" value="0" />
            <input type="text" class="num-input" class="num-input" value="0" />
        </div>
        <div class="btn-group">
            <button data-method="plus">+</button>
            <button data-method="minus">-</button>
            <button data-method="mul">*</button>
            <button data-method="div">/</button>
        </div> -->
    </div>
</body>

</html>